Hi wb1000,
It sounds like you want to know about playing content from iCloud on a smart TV. Is that right?
If you're using an iPhone or Mac, you may be able to do what you describe using AirPlay if the smart TV is compatible: Use AirPlay to stream video or mirror the screen of your iPhone, iPad, or iPod touch - Apple Support
"Stream video from your iPhone, iPad, or iPod touch to a TV
- Connect your device to the same Wi-Fi network as your Apple TV or AirPlay 2-compatible smart TV.1
- Find the video that you want to stream.
- Tap AirPlay . In some apps, you might need to tap a different button first.2 For example, in the Photos app, tap Share , then tap AirPlay .
- Choose your Apple TV or AirPlay 2-compatible smart TV."
We hope that helps. Have a good one.